e707004304
ORANGE EKSTRAKLASA
Dołączył: 17 Gru 2010
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Skąd: England
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 Wysłany: Nie 22:07, 03 Kwi 2011 |
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La,[link widoczny dla zalogowanych], Ce, Th modified ZSM-5 zeolite as a catalyst for the evaluation of paraffin cracking
Coke Coke is free radical reaction mechanism, when the hydrocarbons in the oxygen center ( or (Or m) an R-M + H-M ' homes and then reduce the formation of coke, coke and even lead to the surface activity of the catalyst in the ~ (Lewis acid and alkali in the bA a) blocked the inactivation. So, rare-earth Metal La, ce , and Th ions in the zeolite of these high intensity on the surface of the electrostatic polarization, effectively inhibited the dehydrogenation center M ( or M) reduced the activity of the catalyst surface of the phenomenon of coking coke 2 Conclusion To sum up , Rare earth metal La, ce , Th modified ZSM-5 molecules as alkane cracking catalyst , the cracking conversion rate decreased, but the catalyst surface phenomenon of coking coke has a greater difference. Acknowledgements : This topic will be science in Guizhou Province Technical Committee 1 Lishi Yao and other funding , petrochemical , 1988; .17 (2): 782Magnm ~ Petal, JCatal, 1987; 106 ([ 】 : 2423 Pan fishy so and so on. Fuel Chemistry Report .1986 ; 114 (1 ) 274 CHENG Sen And so on. Catalysis 1985; 6 ( 4): 381
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